statik · May 13, 2021 15:04 · May 13, 2021
diff --git a/example.ts b/example.ts
@@ -0,0 +1,41 @@
+// Given a pre-existing VPC network layout with stable ID, subnets, and routing tables
+// this CDK setup code will populate the context necessary for lookups without going
+// through synth and maintaining the context cache outside of version control
+
+private setupFooVpcContext(): void {
+  // this is the CDK context info for the Demo VPC in the example account
+  const account = "1234"
+  const region = "us-west-2"
+  const tag = "MyDemoVPC"
+  const contextKey =
+      `vpc-provider:account=${account}:filter.tag:Name=${tag}:region=${region}:returnAsymmetricSubnets=true';
+  const contextData = {
+      vpcId: 'vpc-TODO',
+      availabilityZones: [],
+      subnetGroups: [
+          {
+              name: 'Public',
+              type: 'Public',
+              subnets: [
+                  {
+                      subnetId: 'subnet-TODO',
+                      availabilityZone: 'us-west-2a',
+                      routeTableId: 'rtb-TODO',
+                  },
+                  {
+                      subnetId: 'subnet-TODO',
+                      availabilityZone: 'us-west-2b',
+                      routeTableId: 'rtb-TODO',
+                  },
+              ],
+          },
+      ],
+  };
+
+  this.node.setContext(contextKey, contextData);
+}
+
+// then you can use code like
+const vpc = Vpc.fromLookup(this, 'AVPC', {
+    vpcName: 'MyDemoVPC',
+});